Stapling pliers



Sept. 26, 1939. A BALMA 2,174,219

sTAPLING PLIERS Filed March 18, 1936 3 Sheets-Sheet 1 r f/zvwzZZ/"x [do a [2723 dfZOPn/egs.

Sept. Z6, w39. A. BALMA STAPLING PLIERS 3- Sheets-Sheet 2 Filed March 18, 1936 fzz IIIIIIIIIIIIIII IIIIIIIl vPatented Sept. 26, 1939 UNITED STATES 's'rArLmGrLmns Aldo Balma, Voghera, Italy Application March 1,8, 1936, Serial No. 69,457 v In Italy April 15, 1935 My invention relates to a pincher stapler for fastening or clinching together, by means of metallic or similar staples, sheets of paper, cardboard, Celluloid, textile and other. materials. 5. Staplers of the pincher type generally known to the art operate by`having a driver positioned in a driveway, the -driver being operated by va series of levers to detach a staple from -a holding magazine and to clinch said staple onto sheets of paper l and the like. Such Staplers have disadvantages in that a heaping up of the staples adjacent the driver sometimes occurs, and thus causes a jam'-1 ming of the stapler to render it inoperative. Another disadvantage of the previously known 1I' staplers is that when a jani or blocking of the magazine occurs said magazine could not be readilyremoved to effect a cleaning thereof.

Itis van object of my invention to provide means .to prevent the stapler from becoming jammed, n and further, should jamming occur, to provide means by which the magazine may be readily removed and easily cleaned.

Another object is to provide a movable anvilV arm which is operated by the means which subsequentlyalso moves the staple driver so that a rapid and secure clinching oi the staple may be obtained. 'A

The prevention of the jamming of the stapler is accomplished by providing means coacting with the driver and the pincher arms so that the driving operation must be completed before the arms can be expanded into position for a second clinch-- ing operation. Concommitant with the contraction of the arms' for aclinching operation they anvil arm is caused to move toward the driver .in order to clinch'the .staple moved into position by the driver. A

To make the magazine accessible. for ready 4removal and cleaning,y it is retained in position '40 by a removable block locatedrearwardlyon the stapler and secured thereto by a pinl and spring `mechanism that renders 'it readily detachable from said stapler.

These vand other objects and features ofthe 45 invention areset forth more fully in the following description, and in the accompanyingdrawings, in which: f i Fig. l is a-side velevational vView of my pincher type stapler, with part of the outside casing removed, and showing the vpinchers in open-l position;

Fig. 1a is a similar viewv with the device in Iclosed position; 55; Fig. 2 is a side elevational view showing the means for preventing 'the driver from jamming the staples in full' open position; y

Fig. 2a shows the same parts .incompletely closed or clinching position;

Fig. 3 shows a partial similar view with the 5' means set in intermediate position.;

Fig. 4 is a side view, shown partly in section, of the locking block for the removable magazine Fig. 5 is an enlarged sectional view of the front part of the stapler showing the driving mecha- 10 msm; v

Fig. 6 is a sectional view on the line f6- 6 of Fig. 5;

Fig. 1,is a plan. sectional view showing the staple magazine;

Fig. 8 is a side elevational view of themagazine;

Fig. 9 is a plan sectional view valong the line 9-9 of Fig. 5;

Fig. .1o is a side elevational view-of the 1'- 20 shaped piece for holding the driver;

Fig. 11 is a front view of the lower pincher arm 'or lever showing its bifurcation;

Fig. 12 is a cross sectional view on the line I2-I2 of Fig. 8;

Fig. 13v ls a cross sectional view on the line iii-I3 of Fig. 10; and

Fig. 14 is a side view of the spring thrust mechanism of the magazine.

As seen in Figs. 1 and 1a, the stapler com- 80 prises two arms arranged in the manner oi a pair of pinchers. One arm contains the driver and magazine mechanism-while the-other arm is a simple lever as shown at I. An anvil arm 3 is pivoted at 3a to the wall of the casing 5, while 35 the bifurcated portion of lever l and the anvil arm 3 are pivoted togetherat 2. The anvil arm 3 forms the lower clinching jaw` of the pinchers and is provided at one end with a die 3 ior clinching a staple. At the other end of the 40 anvil arm is a. spring 3." which bears against the magazine arm to keep the jaws of the pincher in a normally opened position. Theupper end of the bifurcated arm I is closed by a roller I for a purpose hereinafter described.A

'Ihe upper or magazine arm has afmagazine il for holding the staples, and a'driver B .ior driving them through sheets oimaterial S, Figs. 5 'and 6, and clinching the same by the die 3,' on the lower arm. Driver vIi isheld by a T-shaped member-50 4, Fig. 10, which has at oneend a vertically extendingv part: forming a driver channel portion 4" for the driver 6. A foot 4'.' projects from the. f

'lower end of the channel portion 4' which aids in positioning'the magazine il at Ya notch' Ila 55 shown below the end II. The forward portion of the magazine arm is enclosed by the casing 5 to which the member 4 is secured by screws or rivets 4a and 4b. Member 4 has also a vertical projection 9 to which a rocking lever 1 is secured by means of pin 9. The forward portion of lever 1 engages driver 6 and holds the driver in normally opened position by means of spring IIJ, which extends between lever 1 and member 4. Lever 1 also extends through the bifurcated end of the arm I and bears against the roller I.

Rearwardly of the pin 9 the lever 1 has its end portion slotted at 1 and said slot is intersected by a pin I6 carried by the lever 1. Below the slotted end of lever 1, the member 4 is slotted at 43, (Figs. 2, 2a and 3), and has therein a pin I5. A plate I4 having its lower end slotted at I4' is inserted in slot 43 with the pin I5 in slot I4'. |42 and I43 which form steps for engaging pin I 6 in varying positions of the lever 1. A stop I8 limits forward movement of the curved upper edge I4a of plate I4. Spring I1 secured to the member 4 bears against plate I4 to force it forwardly.

Magazine comprises an elongated member having a notched forward end IIa for engaging the foot 4" of member 4' secured upon the end of member 4 appearing in Fig. 10. Magazine II is channel-shaped in section and contains therein a rod I2, Fig. 7, on which a spring I2 is mounted and connected with a channel-shaped piece I2a for propelling staples IIb, Fig, 7, again, toward the driver 6, the staples being supported upon an inner channel track IIc. The channel shaped member I2a has an interior part I2b receiving the forward end of the rod I2. 'I'he rear end of the rod is provided with a magazine closure member I2. On the upper side of member II is a knob II" which functions as a stop for the magazine-securing block 9.

The magazine II may be easily inserted and withdrawn from its position in the arm of the stapler, and a removable block 9 is provided to hold the magazine inworking position. This block, Fig. 4, may be conveniently formed of a moldable resin. A slot 9 in the upper part of the rear end of the block engages a pin 5 of the rear end of the casing in order to prevent rearward movement of the block. Below the slot 9 is arecess which connects with a chamber in the body of the block. A pin I3 is contained in the recess and chamber and is held in extended position by spring Iii2 as particularly disclosed in Fig. 4. .Pin I3 is finished on one end with a head I3', which is adapted to bear against knob II on the magazine II. When block 9 is in operating position, pin I3- prevents the magazine from moving rearwardly from the arm. It is apparent that the block can be removed by merely pulling it upwardly from the arm.

My pincher stapler operates in the following manner. To load the magazine the block 9 is pulled upwardly from its position and removed from the arm. Magazine II can then be slid rearwardly from the arm and loaded with staples I Ib in an obvious manner. Another and simpler way of loading the magazine is to lower cap I2 and remove it from the magazine.

After the loaded magazine and the block or cap4 I2" have been'replaced, the sheets of mate-y rial S are inserted between thefoot 4 and die 3'; The two arms. of the pincher are then contracted from the position of Fig. 1 to that 0f The forward edge of plate I4 has notches Fig. la. As arm I moves toward the other arm,

plete stapling and a superimposing of staples one 10 upon another, the mechanism of plate I4 is arranged to compel a complete stapling operation before the next staple can be driven. As lever 1 moves the driver C downwardly, its rearward end moves upwardly, Figs. 2, 2a and 3. As shown in 1g detail in Fig. 2, before the clinching operation begins the plate I4 is in normal position, being held against stop I9 by spring I1, and with the pin I 6 resting in step I4. When the rearward end of the lever has moved upwardly a small dis- 20 tance the pin Ii moves from step I4z to rest on the tread of step I43 as shown in Fig. 3. At this point the stapling operation has not been completed, and because pin I 4 rests on the tread of step I43 the pin cannot move downwardly so as u to allow the lever 1 to come into position for another stapling movement. To complete the stapling, the pin I4 continues to rise until, as shown in Fig. 2a, reaches its highest position at the time the driver 8 has completed the driving of a staple. As shown, the pin I9 has lifted the plate I4 by bearing against the upper edge of step |43, the plate I4 at the same time being moved rearwardly by reason of its curved edge I 4a which slides along stop Il. directly above lower step |42, and plate I4 is prevented from moving either forwardly or downwardly by the frictional engagement of the plate I4 against stop I8 by reason of the spring I1.

The driving operation being complete, in the 40 return movement of the operating parts, spring I0 first elevates lever 1 and when it has reached its Ufull elevated position to lift the driver clear of the staple channel in the staple magazine,

spring 3 operates to return the handle I and 45 the anvil arm 9 to their normal positions. 'I'he rear end of lever 1 `in moving downwardly causes the pin I6 to engage the tread of step I4?, and thus moves the plate I4 into normal position.

This operation is repeatedfor every staple 50 driven, the spring I2 causing the staples IIb to advance in the magazine II. Should the arms not be contracted sumciently to drive a staple completely, the arms cannot be expanded to attempt to drive another staple and thus cause 58 jamming. In reloading the magazine, or in removing the same for cleaning, the block 9 can be quickly snatched from its place and the magazine removed, this also being true of cap I2.

It is therefore seen that my pincher stapler may 00 be eilciently operated without encountering the disadvantages of jamming and cleaning existent in the devices heretofore known in the art.

Having shown and described a structure by which I may obtain the objects of my invention, 65

I claim my invention as follows:

1'. A lockingl plate mechanism for a pincher type stapler comprising a rocking lever pivo'tably supported intermediate its ends, a driver attached to one end of said lever, a slot in the rear 70 end of said lever, a pin in said slot, a plate member in said slot andA having stepped. notches in its forward edge adapted to be engaged by said pin, and means for moving said rocking lever.

2. A ,locking plate mechanism as in claim 1, 1I

Pin I8 now lies u i stop.

in .which there is a stop member engaging the forward edge of said plate, and a spring engaging the rear edge of said plate.

3. A securing block for holding a removable magazine in a pincher type stapler, comprising a substantially rectangularly shaped body having a notch in the upper part of the rear end thereof, an opening extending through the lower portion thereof, a movable rod supported in said opening and projecting from the forward end thereof, and spring means holding said rod in a normal projecting position.

4. A locking plate mechanism for a pincher type stapler comprising a driver, a rocking lever arm adapted to operate said driver, movable means engaging against and adapted to movesaid lever arm, and a movable locking plate associated with said lever arm restricting said rocking lever arm to movement in one direction only until said driver has completed its driving operation.

5. A locking-plate mechanism for a pincher type stapler comprising a rocking lever pivotally supported intermediate its ends, a driver engaged by one end of said lever, there being a slot in the rear end of said lever, a pin in said slot, a movable plate member in said slot and having stepped notches in its forward edge adapted to be engaged by the pin in said lever in said slot upon movement of said rocking lever, and means for moving said rocking lever.

6. A locking plate mechanism according to claim 5, in which there is a stationary stop member engaging one edge of the plate member, and a spring engaging the opposite edge of said plate member tending to move the latter toward said '1. A locking plate mechanism for a pincher type stapler-comprising a rocking lever pivotally connected intermediate its ends to a T-shaped member, a driver engaged by said rocking lever at one end of said T-shaped member, there being a slot in the rear end of said rocking lever, there being also a slot in the T-shaped member beneath the slotted end of said rocking lever, a pin intersecting said slot in said rocking lever and a pin intersecting the slot 'in said T-shaped member, a locking plate member having a slotted lower end and a notched forward edge, said slotted lower end engaging the pin intersecting the slot in said T-shaped member, and the pin in said rocking lever engaging in said notches, and means limiting the forward and rearward movement of said plate.

8. A locking plate for a pincher type stapler comprising a substantially rectangular rocking plate having a slotted lower edge, a curved upper edge, and a series of successively deeper stepped notches in a vertical edge.

9. A locking plate mechanism for a pincher type stapler comprising a rocking lever pivotally connected intermediate its ends to a T-shaped member, a driver connected to said rocking lever at one end of said T-shaped member, there being a slot in the rear end of said rockingr lever, there being also a slot in the T-shaped member beneath the'slotted end of said rocking lever, a pin intersecting said slot -in said rocking lever, a pin intersecting the slot in said T-shaped member, and a locking plate member having a slotted lower end and a notched forward edge, said slotted lower edge engaging'the pin intersecting the slot ln said T-shaped member, and the pin in said rocking lever engaging in said slots.

ALDO BALMA. 

